import { asyncRoutes, constantRoutes } from '@/router'
//导入获取菜单数据的方法
import { getMenuList } from '@/api/user';

/**
 * Use meta.role to determine if the current user has permission
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.includes(role))
  } else {
    return true
  }
}

/**
 * Filter asynchronous routing tables by recursion
 * @param routes asyncRoutes
 * @param roles
 */

 //导入Layout组件
 import Layout from '@/layout'
 /**
 * 过滤出所有拥有权限的菜单
 * @param routes asyncRoutes
 * @param roles
 */
 export function filterAsyncRoutes(routes, roles) {
 const res = []
 routes.forEach(route => {
 const tmp = { ...route }
 //判断是否有相应的权限
 if (hasPermission(roles, tmp)) {
 //获取组件
 const component = tmp.component;
 //判断该路由使用有组件
 if(route.component){
 //判断是否是根组件
 if(component === 'Layout'){
 tmp.component = Layout;
 }else{
   //获取对应的具体的组件信息
tmp.component = (resolve) => require([`@/views${component}`],resolve)
}
}
//判断是否有子菜单
if (tmp.children) {
tmp.children = filterAsyncRoutes(tmp.children, roles)
}
res.push(tmp)
}
})
return res
}

// export function filterAsyncRoutes(routes, roles) {
//   const res = []

//   routes.forEach(route => {
//     const tmp = { ...route }
//     if (hasPermission(roles, tmp)) {
//       if (tmp.children) {
//         tmp.children = filterAsyncRoutes(tmp.children, roles)
//       }
//       res.push(tmp)
//     }
//   })

//   return res
// }

const state = {
  routes: [],
  addRoutes: []
}

const mutations = {
  SET_ROUTES: (state, routes) => {
    state.addRoutes = routes
    state.routes = constantRoutes.concat(routes)
  }
}

const actions = {
generateRoutes({ commit }, roles) {
return new Promise((resolve,reject) => {
getMenuList().then(res=>{
let accessedRoutes;//存放对应权限的路由信息
//如果状态码为200，则表示成功
if(res.code === 200){
accessedRoutes = filterAsyncRoutes(res.data, roles)
}
//将路由信息保存到store中
commit("SET_ROUTES",accessedRoutes);
resolve(accessedRoutes);
}).catch(error=>{reject(error);
});
})
}
}
// const actions = {
//   generateRoutes({ commit }, roles) {
//     return new Promise(resolve => {
//       let accessedRoutes
//       if (roles.includes('admin')) {
//         accessedRoutes = asyncRoutes || []
//       } else {
//         accessedRoutes = filterAsyncRoutes(asyncRoutes, roles)
//       }
//       commit('SET_ROUTES', accessedRoutes)
//       resolve(accessedRoutes)
//     })
//   }
// }


export default {
  namespaced: true,
  state,
  mutations,
  actions
}
